Product Details Product Details Approx. 4 in. x 4in.Stone materialFull color designProtects surfaces from moisterMix and match styles to build a unique setLIMESTONEUSA Officially Licensed Keep your surfaces protected and show your Spartans support with this Michigan State Spartans Coaster. This Coaster features a MSU alumni printed on a 4x4 stone coaster. Go Spartans!